Note 6 - Goodwill and Intangibles - Changes in Goodwill (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Goodwill, gross | $ 226,889 | $ 231,999 | $ 233,877 |
| Accumulated impairment losses | (107,265) | (102,041) | (102,041) |
| Goodwill | 119,624 | 129,958 | 131,836 |
| Foreign currency translation adjustment | (5,110) | (1,878) | |
| Asset impairment charge | (5,224) | ||
| NET Services [Member] | |||
| Goodwill, gross | 191,215 | 191,215 | 191,215 |
| Accumulated impairment losses | (96,000) | (96,000) | (96,000) |
| Goodwill | 95,215 | 95,215 | 95,215 |
| Foreign currency translation adjustment | |||
| Asset impairment charge | |||
| WD Services [Member] | |||
| Goodwill, gross | 35,674 | 40,784 | 42,662 |
| Accumulated impairment losses | (11,265) | (6,041) | (6,041) |
| Goodwill | 24,409 | 34,743 | $ 36,621 |
| Foreign currency translation adjustment | (5,110) | $ (1,878) | |
| Asset impairment charge | $ (5,224) | ||